Project description:We used microarrays to detail the global programme of gene expression underlying cellularisation and identified distinct classes of up-regulated genes during this process.
Project description:RNA isolated from the cultures treated with 0 and 50 micromolar AFB1 at 15, 30, 60, 90, 120 min was used for microarray experiments. For each array hybridization experiment, RNAs from the treated sample and its corresponding time-matched control were co-hybridized to arrays and respectively quantified in different channels. A dye swap strategy was used to eliminate the dye bias. Keywords: time-course
Project description:To investigate effects of carbon nanotubes (CNTs) om total expression profile of tomato plants we introduced CNTs in MS agar medium in concentrationd 0, 50, 100, 200 ug/ml Objectives for this study included the identification of genes that were up or down-regulated at the transcriptional level in tomato seedlings in response to carnom nanotubes (CNTs).
Project description:RNA isolated from the cultures treated with 0 and 50 micromolar AFB1 at 15, 30, 60, 90, 120 min was used for microarray experiments. For each array hybridization experiment, RNAs from the treated sample and its corresponding time-matched control were co-hybridized to arrays and respectively quantified in different channels. A dye swap strategy was used to eliminate the dye bias. Keywords: time-course
Project description:To investigate effects of carbon nanotubes (CNTs) om total expression profile of tomato plants we introduced CNTs in MS agar medium in concentrationd 0, 50, 100, 200 ug/ml Objectives for this study included the identification of genes that were up or down-regulated at the transcriptional level in tomato seedlings in response to carnom nanotubes (CNTs). 10 day old root tips and first two leaves of wild type tomato seedlings (cv. Micro-Tom) growing on regular MS agar medium or MS medium supplemented with carbon nanotubes (50, 100, 200 ug/ml) or MS medium supplemented with activated carbon (50 ug/ml) were selected for RNA extraction and hybridization on Affymetrix microarrays.
Project description:The number and type of synthetic chemicals that are being produced worldwide continues to increase significantly. While these industrial chemicals provide numerous benefits, there is no doubt that some have potential to damage the environment and health. Toxicity must be evaluated and use must be carefully controlled and monitored in order to minimize potential damage. DNA microarray technology has become an important new technique in toxicology. We are using the yeast Saccharomyces cerevisiae as a model organism for toxicological study because it is a simple, fast-growing eukaryote that has been thoroughly characterized. In order to evaluate toxicity by newly synthesized or mixture chemicals, toxicity-induced gene expression alteration profiles by known chemicals should be collected. In our study, cells need to be exposed with same experimental cellular condition, semi lethal (IC50), respectively. In the case of pentachlorophenol (CAS; 87-86-5), the exposure dose was decided as 50 uM by growth curve with continuously diluted exposure. Pentachlorophenol is a pesticide (fungicides) that is recognized as a carcinogen and suspected to be cardiovascular or blood toxicant, developmental toxicant, endocrine toxicant, gastrointestinal or liver toxicant, immunotoxicant, kidney toxicant, neurotoxicant, reproductive toxicant, respiratory toxicant and skin or sense organ toxicant. Keywords: stress response
Project description:Exposure to environmental mercury (Hg) currently may contribute to immune system dysfunction and autoimmune disease. In this study phosphoproteomic analysis was used to investigate the impact of Hg2+ on a B cell line. Treatments were with 0, 2, 5, 10, 20, 50 and 100 uM Hg2+. 1713 phosphoproteins and 1937 confidently localized phosphorylation sites were identified. 161 phosphoproteins responded to Hg2+ treatment (ANOVA, 10% FDR). Hg2+ at 50 and 100 uM stimulated Tyr phosphorylation on residues in the B-cell receptor complex as well as other systems. At 20 uM and below Hg2+ primarily caused hyperphosphorylation of pSer/Thr residues and affected cytoskeletal systems. Map Kinase 1 was exceptional as it was hyperphosphorylated at Tyr 185 following 20 uM and lower Hg2+ treatments. These results contribute novel insight into the mechanism for immune system disruption by Hg2+.